Edward f



E; GORDON. Steam-Railiator;

Paf ent ed: May"; isso N-PETERS. PNOTO-UTHOQIPHER. WASHINGTON. D C.

NITED STATES.

PATENT OFFIQE.

ASSIGNOR TO OF SAME PLACE.

' STEAM-RADIATOR.

SPECIFICATION formingpart of LettersPatent No. 227,517, dated May 11,1880.

' Application filed October 13, 1879.

To all whom it may concern:

Be it known that I, EDWARD F. GORDON, of Concord, New Hampshire, haveinvented certain Improvements in Steam-Radiators; and

I do hereby declare that the following is a full,

My invention consists in a radiator tube or series of tubes composed ofan inner and outer sheet-metal shell, with base and cap to close at theends the space between the two shells, and provided with clamping meansfor con fining the edges steam or air tight, also, in the other devicesand combinations of devices re-- cited in the claims. a

The best mode in which I have contemplated applying my inventions isshown in the drawings, in which- Figure 1 is partly a side elevation andpartly a vertical section of a pair of my radiatingtubes joined by theclamps, the base, and cap. Fig. 2 is a horizontal section taken at line.00, Fig. 1.

Sheet metal possesses many qualities especially adapting it to therequirements of a radiator-tube beyond those pertaining to ordinarywrought or cast iron tubes. Among these qualities are lightness andeconomy of metal, and consequently a radiator-tube of this material willbecome heated and begin to radiate heat much quicker after the admissionof the steam than would the tubes ordinarily used, and less steam wouldbe condensed and wasted.

Economy in use therefore follows the employ may be placed concentricallyor eccentrically to each other, leaving the space S either substantiallyannular or more or less crescentshaped in cross-section.

For various reasons I prefer the crescent form indicated in Fig. 2,produced by placing the inner tube, B, in contact with one side of thelarger tube, which incloses it. By this arrangement of the two shells Iam enabled to clamp the edges of both and make an air-tight joint byholding such edges between two clamping-plates tightened together byscrews or rivets.

In practice my radiator-tubes are used in pairs with a suitable base andcap, as denoted in the drawings, each tube of such pair having the innerand outer shells with the space between them connected by a steam-pipe,J, and

with inlet and outlet to provide for circulation. Any desired number ofthese unitary radiators may be employed and properly connected,according to the amount of heating or cooling surface required.

In order to unite to each other at one operation the two tubes of a pairand the two shells of each tube, as well as to avoid running either ofthe clamp-bars inside of the inner shell, I form each shell, as clearlyshown in Fig. 2, with a flangeor straight lip along one side, consistingof the meeting edges of the metal sheet turned outwardly and parallel,the flanges b of the inner shell lying between and in contact withthose, a, of the outer. These parts of the tubes are turned toward eachother and abut, so that the clamping of one secures both, the clampscrews or rivets passing through the metal flanges or between them alonga central line. If preferred, the flanges may interlock or lap by eachother and may berivet-ed firmly together. In either case I interposelitharge, red lead, or some cement to perfect these joints and others inthe apparatus. By the use of the clamp-plates C and screws D, I amenabled to disconnect the tubes of .a pair and readily remove eitherone, if desired.

From the preceding description it will be apparent that by my inventiona vast increase in radiating power is obtained, since the inner Isurface of the shell B is utilized for that pur- IOO pose, the airwithin it rising when heated, and being replaced continually by cool airfrom below. To provide for this circulation I form both base E and cap Fwith an opening, Gr, corresponding with that through the shell B, and ofas great an area as is practicable. I also set the base above the floorto admit air freely, or I form air-inlets e in the base for the samepurpose. When a marble slab or other cover is placed upon the caps Iform similar channels in or through the caps or covers, that thecirculation of this air-current may not be impeded.

The bases and caps are preferably iron castin gs formed with grooves toreceive the edges of the sheet metal at bottom and top of each tube orshell and hold them in position, and

having wider openings to receive the flanges a. I) and clamp-bars O. Thebase and cap are united by vertical bolts H or other suitable means. Iam accustomed to form in these castings, by coring, suitable channels J,for entrance and exit of the steam and for its passage in the cap fromone tube to the other, and thusI avoid extra joints, piping, andfitting, and reduce expense.

Ido not deem it necessary to describe the mode of rolling thesheet-metal shells to form the tubes, as such process will be readilyunderstood by any skilledmetal-worker.

I claim as of my invention 1. The duplex tube herein described, adaptedto radiate from its inner and outer surfaces, having its inner and outershells united along one side by clampingrplates, and formed with a 3 5space between these surfaces for the circulation of a heating or coolingmedium, substantially as set forth.

2. A radiator-tube formed, as described, of two sheet-metal shellshaving flanges a b 0 clamped or riveted together, substantially as setforth.

3. The combination of the sheet-metal tube A B, having interior andexterior radiatingshells arranged eccentrically, with an open base 45and cap, substantially as set forth.

4. The improvement in forming radiator tubes herein described,consisting in rolling to shape the sheet-metal shells and uniting theiredges by clamping-plates, substantially as set so forth.

EDWARD F. GORDON.

Witnesses ALLISON M. STIoKNEY, L. FRANK MANSFIELD.

